Improvement in drive-well strainers



w c. MACOMBER.

Drive-Well Strainers.

Pa'tnted M'a rch f9, 1875.

THE GRAPHIC C0.PHOTO.'L|TH.3 9&.4'I PARK PLAGEJLY.

WYMAN O. MAOOMBER, OF MINNEAPOLIS, MINN., ASSIGNOR, BY MESNEASSIGNMENTS, TO THE MINNEAPOLIS MANUFACTURING COMPANY,

OF SAME PLACE.

IMPROVEMENT IN DRIVE-WELL STRAINERS.

Specification forming part of Letters Patent No. 160,692, dated March 9,1875 application filed March 11, 1873.

To all whom it may concern:

Be it known that I, WYMAN O. MAOOMBER, of Minneapolis, county ofHennepin and State of Minnesota, have invented certain new and usefulImprovements in Drive-Well Strainers, of which the following is a full,clear, and exact description, reference being had to the accompanyingdrawing, making part of this specification, in which- Figure l is a sideView of a section of a drive well tube embodying my invention. Fig. 2 isa vertical sectional view of the same and Fig. 3 is a sectional viewthrough line 00 m, Fig. 1.

The object of this invention is to overcome certain difficultiesexperienced in the application or use of drive-wells as heretofore co'iistructed, arising from the necessity of covering the elongatedperforations of the tube with wire cloth or gauze to prevent the ingross of sand to the tubes, the frail character of the wire-gauzerendering it liable to be torn off and destroyed in the process ofdriving the tubes. To remedy this difficulty various forms of guardshave been devised for protecting the gauze in the process of driving thetubes, such as straps of iron covering the openings or perforations inthe tubes, but sufficiently removed from the wire-gauze covering topermit the ingress of water, and fast ened at points intermediatebetween the perforations; but in practice it was found that these strapswere broken down in the pro cess of driving, or so pressed against thewiregauze by the surrounding pressure as to close the openings andprevent the free ingress of water. To remedy this difficulty round rodsor bars were substituted, running lengthwise of the tubes, in linesparallel with and directly over the elongated gauze-covered openings,and soldered directly to the tubes at points intermediate between suchopenings.

This construction, while obviating the danger of breaking down theguards, was found to seriously diminish the capacity of the openings forthe supply of water to the tube, inasmuch as the round forms of theguard caused them to recede so slowly from the point of actual contactwith the wire-gauze that they obstructed the free admission of the waterto the perforations in the tube. It thus became necessary to eitherincrease the number of the perforations or slots for the admission ofthe water, and thereby endanger the strength of the well-tubes alreadyweakened as far as practicable, consistent with the strength requiredfor driving, and for the after resistance of the surrounding pressure,or to devise some form of guard which, while effectually protecting thewire-gauze in the process of driving, should at the same time offer theleast possible resistance to the flow of water when the tube was inplace. With the view of meeting this necessity, and of overcoming thedifficulties recited, I devised the present improvement, which consistsin forming the guards in a triangular or V shape, and uniting them tothe tube, so that they extend directly over the perforations, in suchmanner as that, while effectually protecting the Wiregauze in theprocess of driving, the rapidlyreceding lines or sides of the triangularguards afford ready access of the water to the perforations in, andconsequent ready admission of the water to, the well-tube.

In the drawing, A is a perforated lower section of a drive-well tube. Bis the point, inserted in the lower end of the tube. (3 is ascrew-thread, by which the lower section of the tube is connected withand supplemented by the next upper section. D D are the slots for theadmission of water to the tube, said slots being elongated vertically,and placed in parallel rows. E is wire-gauze, placed over said slots,and soldered to the tubes. F F are the triangular guards referred to,placed over the slots D D and wire-gauze E, presenting an acute angleadjacent to or in contact with the tube, and soldered to the tube atpoints intermediate between the slots or perforations, as

indicated at a to. These guards thus applied, as will be seen from thedrawings, present a 'broad outer base to the action of the earth,

and thus force it away from the wire-gauze much more effectually than around guard would do in the process of driving the tube, therebypreventing injury to the delicate gauze, while at the same time theconverging lines or sides of the guard, terminating in an acute angle atthe gauze, permit the ready ingress of Water to the perforations orslots in the Well-tube.

In practice this construction has been found to effectually overcome thedifficulties recited, and, therefore, to remove the objectionsheretofore urged against the use of drive-Wells.

Having thus described my invention, What I claim as new, and desire tosecure by Letters Patent, is

The triangular-or V-shaped guards F F, constructed and appliedsubstantially as described, for better protecting the Wire-gauzecovering the slots in the Well-tube, and permitting a free ingress ofwater to the tube, as set forth.

WYMAN O. MAOOMBER.

Witnesses:

F. O. GRIsWoLD, M. A. MOREY.

